I'm going through a similar situation. my leaves started turning yellow, with brown tips, a few weeks in. i figured they were too close to the lights or getting too hot, so i put a fan in, and lifted the lights. no progress. so i figured they weren't getting proper nutrients. i checked the ph in the soil, which was 8. i adjusted the ph of the water, to 5 to balance it out for the next few waterings, but there was no improvement. i checked the soil ph again and it is still 8. the first sets of leaves that grew are all dead now, but new leaves keep growing and seem healthy. but everytime a new set gets big, the one underneath starts getting burned looking edges on the tips of the leaves, starts turning yellow, and eventually dies like the ones below. figured it was from the water having such a low ph resulting in nutrient burn, so i just started using distilled water. and its happening still. i also noticed a few white dots on one leaf. i cant seem to find any help with this exact situation.
